CN219457822U - Energy storage device - Google Patents

Abstract

The utility model discloses an energy storage device, comprising: the battery module comprises a plurality of battery modules, a plurality of connecting pieces, a plurality of switching pieces and a bracket, wherein each battery module is provided with a first direction, a second direction and a third direction, the first direction, the second direction and the third direction are orthogonal to each other, and the plurality of battery modules are stacked along the third direction. Two ends of each connecting piece are respectively connected with two adjacent battery modules, and each adapter piece is connected to one side of the battery modules in the second direction. The support is located one side of the second direction of battery module, and the support links to each other with a plurality of adaptor in one side of second direction, and the support is suitable for with the mounting in the opposite side of second direction. According to the energy storage device of the present utility model, by stacking a plurality of battery modules in the height direction of the battery modules, one side of the battery modules is connected to the bracket through the adapter and then mounted on the fixing member through the bracket. The mounting difficulty of the energy storage device and the fixing piece is reduced, the assembly efficiency of the energy storage device is improved, and the labor cost is reduced.

Description

Energy storage device

Technical Field

The utility model relates to the technical field of energy storage, in particular to an energy storage device.

Background

The energy storage system is used for matching with photovoltaic power generation, can effectively solve the problem that a public power grid is difficult to cover, and basic life electricity such as illumination, television, broadcasting and the like is provided by remote rural areas, pastoral areas, islands, deserts and frontier sentry posts, and meanwhile, the energy storage system is connected with a commercial power grid, so that the connection rate of the photovoltaic power generation is improved.

In the related art, when the energy storage system is installed with the wall body, more parts are needed, the installation difficulty is high, the installation stability is poor, the energy storage system cannot be hung on the wall body for a long time, and the labor cost is high.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide an energy storage device, which reduces the difficulty in installing the energy storage device and the fixing member, improves the assembly efficiency of the energy storage device, and effectively reduces the labor cost.

According to an embodiment of the present utility model, an energy storage device includes: a plurality of battery modules, each of the battery modules having a first direction, a second direction, and a third direction, the first direction, the second direction, and the third direction being orthogonal to each other, the plurality of battery modules being stacked along the third direction; the two ends of each connecting piece are respectively connected with two adjacent battery modules; a plurality of adapters, each of which is connected to one side of the battery module in the second direction; and the bracket is positioned at one side of the battery module in the second direction, is connected with the plurality of the switching pieces at one side of the battery module in the second direction, and is suitable for being connected with the fixing piece at the other side of the battery module in the second direction.

According to the energy storage device provided by the embodiment of the utility model, a plurality of battery modules are stacked along the height direction of the battery modules, one side of each battery module is connected with the bracket through the adapter, and then the battery modules are installed on the fixing piece through the bracket. Therefore, compared with a traditional energy storage system, the installation difficulty of the energy storage device and the fixing piece is reduced, the assembly efficiency of the energy storage device is improved, and the labor cost is effectively reduced.

According to some embodiments of the utility model, the plurality of the adapters includes a plurality of first adapters and a plurality of second adapters, the first and second adapters being located at both ends of the third direction of the battery module, respectively, the first adapter being open at a side thereof remote from the center of the bracket in the first direction, and the second adapter being open at a side thereof remote from the battery module in the second direction.

According to some embodiments of the utility model, the first adapter comprises a first connection section, a second connection section and a third connection section connected to each other, the first connection section is perpendicular to the second connection section, a fastener passes through the first connection section to be connected with the battery module, the third connection section is connected between the first connection section and the second connection section, and the third connection section is connected with the bracket.

According to some embodiments of the utility model, the first adapter further comprises: and the fourth connecting section is connected between the first connecting section and the second connecting section, and the third connecting section and the fourth connecting section are respectively positioned at two sides of the first connecting section in the third direction.

According to some embodiments of the utility model, the second adapter includes a fifth connection segment and a sixth connection segment connected to each other, the fifth connection segment being perpendicular to the sixth connection segment, a fastener passing through the fifth connection segment to connect to the battery module, the sixth connection segment being connected to the bracket.

According to some embodiments of the utility model, the second adaptor further comprises two seventh connecting sections, the two seventh connecting sections are located at two ends of the fifth connecting section in the first direction, and each of the seventh connecting sections is connected to the fifth connecting section and the sixth connecting section, respectively, and the cross-sectional area of each of the seventh connecting sections in the third direction gradually decreases in a direction away from the center of the bracket.

According to some embodiments of the utility model, the energy storage device further comprises: the two ends of each first connecting piece are respectively connected with the first adapter piece and the bracket; and two ends of each second connecting piece are respectively connected with the second adapter piece and the bracket.

According to some embodiments of the utility model, the first connector comprises a first connecting portion and a second connecting portion connected to each other, the first connecting portion is perpendicular to the second connecting portion, the first connecting portion is connected to the first adapter, and the second connecting portion is connected to the bracket.

According to some embodiments of the utility model, the bracket is i-shaped, and the bracket comprises two first connecting plates and a second connecting plate, wherein each first connecting plate extends along the first direction, the second connecting plate extends along the third direction, the second connecting plates are respectively connected with the two first connecting plates, and the second connecting plates are positioned in the middle of the first connecting plates.

According to some embodiments of the utility model, at least one recess is formed in each first web, and a fastener is attached to the second web through a bottom wall of the recess.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram illustrating an assembly of an energy storage device and a fixture according to an embodiment of the present utility model;

fig. 2 is a schematic view of a battery module of an energy storage device according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of an energy storage device according to an embodiment of the present utility model;

FIG. 4 is an enlarged view of portion A, circled in FIG. 3;

FIG. 5 is a schematic view of a battery module, an adapter, and a connector of an energy storage device according to an embodiment of the present utility model;

FIG. 6 is an enlarged view of portion B of FIG. 5;

FIG. 7 is a schematic view of another angle of an energy storage device according to an embodiment of the present utility model;

fig. 8 is a schematic view of a second adapter and a second connector according to an embodiment of the present utility model.

Reference numerals:

100: an energy storage device;

1: a battery module; 11: convex ribs; 2: a connecting piece; 3: an adapter; 31: a first adapter; 311: a first connection section; 312: a second connection section; 313: a third connecting section; 314: a fourth connecting section; 32: a second adapter; 321: a fifth connecting section; 322: a sixth connection section; 323: a seventh connection section; 4: a bracket; 41: a first connection plate; 411: a groove; 412: a mounting groove; 42: a second connecting plate; 43: a positioning plate; 5: a fastener; 6: a first connector; 61: a first connection portion; 62: a second connecting portion; 7: a second connector; 8: a base;

200: and a fixing piece.

Detailed Description

An energy storage device 100 according to an embodiment of the present utility model is described below with reference to fig. 1-8.

As shown in fig. 1 to 8, an energy storage device 100 according to an embodiment of the present utility model includes a plurality of battery modules 1, a plurality of connection members 2, a plurality of adapter members 3, and a bracket 4. In the description of the present utility model, "plurality" means two or more.

Specifically, each of the battery modules 1 has a first direction (e.g., a left-right direction in fig. 1), a second direction (e.g., a front-rear direction in fig. 1), and a third direction (e.g., an up-down direction in fig. 1), the first direction, the second direction, and the third direction being orthogonal to each other, and the plurality of battery modules 1 are stacked in the third direction. Two ends of each connecting member 2 are connected to two adjacent battery modules 1, respectively, and each adapter 3 is connected to one side of the battery modules 1 in the second direction. The bracket 4 is located at one side of the battery module 1 in the second direction, and the bracket 4 is connected to the plurality of adapters 3 at one side of the second direction, and the bracket 4 is adapted to be connected to the fixing member 200 at the other side of the second direction.

For example, in the example of fig. 1 to 3, a plurality of battery modules 1 are stacked in order in the height direction of the battery modules 1, positioning holes are formed in each battery module 1, both ends of the positioning pins are fitted into two positioning holes of two adjacent battery modules 1, respectively, and the two adjacent battery modules 1 are positioned by the fitting of the positioning holes and the positioning pins. The protruding ribs 11 are arranged on one side, adjacent to the fixing piece 200, of each battery module 1, two protruding ribs 11 are arranged, the two protruding ribs 11 are spaced apart along the first direction, each protruding rib 11 extends along the third direction, two ends of the connecting piece 2 are respectively matched with the protruding ribs 11 of the two adjacent battery modules 1, and the fastening piece 5, such as a screw, penetrates through the connecting piece 2 to be connected with the protruding ribs 11, so that connection of the two adjacent battery modules 1 is achieved, and the battery module is simple to install and convenient to operate.

During installation, one end of the positioning pin can be inserted into the positioning hole of one of the two adjacent battery modules 1, then the other one of the two adjacent battery modules 1 is placed on the one battery module 1, the other end of the positioning pin is inserted into the positioning hole of the other battery module 1, and then the two ends of the positioning pin are respectively inserted into the positioning holes of the two battery modules 1 stacked up and down so as to position the stack of the two adjacent battery modules 1, and finally the ribs 11 of the two adjacent battery modules 1 are connected through the connecting piece 2, so that the connection of the two adjacent battery modules 1 is realized.

As shown in fig. 3, the adaptor 3 is mounted on one side of the battery module 1 in the second direction, so as to facilitate connection with the bracket 4 located in the second direction, thereby effectively reducing the space occupation of the energy storage device 100. The number of the four adapters 3 may be four, the four adapters 3 are disposed on two opposite sides of the battery module 1 along the first direction, and the four adapters 3 are all adjacent to corners of the battery module 1, so that connection reliability of the bracket 4 and the battery module 1 can be increased, and connection stability of the energy storage device 100 on the fixing member 200 can be effectively increased.

During installation, the adaptor 3 is firstly installed on the battery module 1, then the adaptor 3 is connected with the bracket 4, and finally the bracket 4 is fixed on the fixing piece 200, so that the energy storage device 100 is installed on the fixing piece 200, the connection mode is simple, the operation is convenient, the installation efficiency is effectively improved, and the labor cost is reduced.

The fixing piece 200 may be a wall body, or may be another installation position, which is beneficial to connecting and fixing the energy storage device 100, and the utility model is not limited to the fixing piece 200 specifically.

According to the energy storage device 100 of the embodiment of the present utility model, by stacking a plurality of battery modules 1 in the height direction of the battery modules 1, one side of the battery modules 1 is connected to the holder 4 through the adapter 3 and then mounted on the fixture 200 through the holder 4. Therefore, compared with the traditional energy storage system, the mounting difficulty of the energy storage device 100 and the fixing piece 200 such as a wall body is reduced, the assembly efficiency of the energy storage device 100 is improved, and the labor cost is effectively reduced.

According to some embodiments of the present utility model, as shown in fig. 1 and 3, the plurality of adapters 3 includes a plurality of first adapters 31 and a plurality of second adapters 32, the first adapters 31 and the second adapters 32 being respectively located at both ends of the battery module 1 in a third direction, a side of the first adapters 31 remote from the center of the bracket 4 being open in the first direction, and a side of the second adapters 32 remote from the battery module 1 being open in the second direction.

Referring to fig. 3 to 6, in the third direction, the first adapter 31 is positioned at the top of the battery module 1, and the second adapter 32 is positioned at the bottom of the battery module 1. Each first adapter 31 has a side wall on a side facing the center of the bracket 4, and two first adapters 31 can hold the battery module 1. By opening one side of the first adapter 31 away from the center of the bracket 4, on the one hand, the connection of the first adapter 31 to the battery module 1 is facilitated; on the other hand, since the battery module 1 generates a large amount of heat during operation, the side of the first adapter 31 remote from the center of the bracket 4 is opened, and the heat dissipation efficiency of the energy storage device 100 can be improved.

Referring to fig. 5, 7 and 8, the side of the second adapter 32 away from the battery module 1 is opened, i.e., the side of the second adapter 32 close to the battery module 1 has a sidewall, which improves the connection area between the second adapter 32 and the battery module 1, thereby improving the mounting stability of the second adapter 32 on the battery module 1 and simultaneously facilitating the heat dissipation of the battery module 1.

Wherein, as shown in fig. 4, the first connector 31 includes a first connection section 311, a second connection section 312, and a third connection section 313 connected to each other, the first connection section 311 is perpendicular to the second connection section 312, the fastener 5 passes through the first connection section 311 to be connected to the battery module 1, the third connection section 313 is connected between the first connection section 311 and the second connection section 312, and the third connection section 313 is connected to the bracket 4. Wherein the first connection section 311 may extend in the third direction of the battery module 1, and a plurality of fasteners 5, such as screws, may be all connected to the battery module 1 through the first connection section 311. The second connection section 312 may be disposed at one side of the first connection section 311 near the battery module 1 and extend along the first direction to clamp both sides of the battery module 1 in the first direction, thereby improving the use stability of the battery module 1. The third connection section 313 may be located above the first connection section 311, and both sidewalls of the third connection section 313 are connected to the first connection section 311 and the second connection section 312, respectively, and a plurality of fasteners 5, such as screws, are connected to the bracket 4 through the third connection section 313. The first connection section 311, the second connection section 312 and the third connection section 313 are perpendicular to each other, connection between the battery module 1 and the fixing member 200 is achieved through the first adapter member 31, and at the same time, the stability in use of the first adapter member 31 is effectively increased, and the first adapter member 31 is simple in structure and convenient to process.

Further, as shown in fig. 4, the first adapter 31 further includes a fourth connecting section 314, the fourth connecting section 314 is connected between the first connecting section 311 and the second connecting section 312, and the third connecting section 313 and the fourth connecting section 314 are located at both sides of the first connecting section 311 in the third direction, respectively. I.e. the fourth connecting section 314 is provided at the end of the first and second connecting sections 311, 312 remote from the third connecting section 313. Therefore, the connection stability between the first connection section 311 and the second connection section 312 is further enhanced, the deformation of the first connector 31 caused by the tensile force between the first connection section 311 and the third connection section 313 and the fastener 5 is avoided, and the structural strength of the first connector 31 is further enhanced.

According to some embodiments of the present utility model, referring to fig. 6 and 8, the second adapter 32 includes a fifth connection section 321 and a sixth connection section 322 connected to each other, the fifth connection section 321 is perpendicular to the sixth connection section 322, the fastener 5 is connected to the battery module 1 through the fifth connection section 321, and the sixth connection section 322 is connected to the bracket 4. Therefore, the battery module 1 and the bracket 4 are connected by the fifth connecting section 321 and the sixth connecting section 322, the space occupied by the connecting part of the battery module 1 and the fixing piece 200 is reduced, the space utilization rate is improved, and the second adapter piece 32 is simple in structure and convenient to process.

Further, referring to fig. 6 and 8, the second adapter 32 further includes two seventh connecting sections 323, the two seventh connecting sections 323 are located at both ends of the fifth connecting section 321 in the first direction, respectively, and each seventh connecting section 323 is connected with the fifth connecting section 321 and the sixth connecting section 322, respectively, and the cross-sectional area of each seventh connecting section 323 is gradually reduced in the third direction in a direction away from the center of the bracket 4. The two seventh connection sections 323 are provided at both sides of the fifth connection section 321 and the sixth connection section 322 opposite to each other in the first direction, increasing the structural strength of the second adapter 32. Wherein, the cross-sectional area of the side of the seventh adapter 3 near the connection of the fifth connection section 321 and the sixth connection section 322 is larger, and the cross-sectional area of the side of the seventh connection section 323 far from the connection of the fifth connection section 321 and the sixth connection section 322 is smaller. Thereby, while securing the structural strength of the second adapter 32, the weight of the second adapter 32 is reduced, while facilitating the installation of the fasteners 5 on the fifth and sixth connection sections 321 and 322.

In some alternative embodiments, as shown in fig. 4 and 6, the energy storage device 100 further comprises a plurality of first connectors 6 and a plurality of second connectors 7. The two ends of each first connecting piece 6 are respectively connected with the first adapting piece 31 and the bracket 4, and the two ends of each second connecting piece 7 are respectively connected with the second adapting piece 32 and the bracket 4. Since the first connection section 311 of the first connector 31 connecting the battery module 1 and the third connection section 313 of the connection bracket 4 are perpendicular to each other, the first connection section 311 extends in the third direction of the battery module 1, the third connection section 313 extends in the second direction, the main body plane of the bracket 4 is parallel to the first connection section 311 such that the third connection section 313 is perpendicular to the bracket 4, the third connection section 313 and the bracket 4 are connected by the first connector 6 to mount the first connector 31 on the bracket 4, the size of the first connector 31 can be reduced, and the connection reliability of the first connector 31 and the bracket 4, and the connection reliability of the first connector 6 and the first connector 31 can be ensured.

Since the fifth connection section 321 of the second adapter 3, which connects the battery module 1, and the sixth connection section 322 of the connection bracket 4 are perpendicular to each other, the fifth connection section 321 extends in the third direction of the battery module 1, the sixth connection section 322 extends in the second direction, the main body plane of the bracket 4 is parallel to the fifth connection section 321, so that the sixth connection section 322 is perpendicular to the bracket 4, the sixth connection section 322 and the bracket 4 are connected by the second connector 7 to mount the second adapter 32 on the bracket 4, the size of the second adapter 32 can be reduced, and the connection reliability of the second adapter 32 and the bracket 4, and the connection reliability of the second connector 7 and the second adapter 32 can be ensured.

Further, the first connection member 6 includes a first connection portion 61 and a second connection portion 62 connected to each other, the first connection portion 61 is vertically connected to the second connection portion 62, the first connection portion 61 is connected to the first connection member 31, and the second connection portion 62 is connected to the bracket 4. As shown in fig. 4, the first connection portion 61 and the second connection portion 62 are coplanar, the first connection portion 61 extends along the second direction, the second connection portion 62 extends along the first direction, the support 4 may include a positioning plate 43, the positioning plate 43 is perpendicular to the third connection section 313, two ends of the first connection member 6 are respectively connected with the third connection section 313 and the positioning plate 43, that is, the first connection portion 61 is connected with the third connection section 313, and the second connection portion 62 is connected with the positioning plate 43, so as to achieve connection between the first connection member 31 and the support 4. Alternatively, the first connecting portion 61 and the second connecting portion 62 may not be coplanar (not shown), the first connecting portion 61 and the third connecting portion 313 may be connected in parallel, and the second connecting portion 62 and the main body of the bracket 4 may be connected in parallel, so that the first adapter 31 may be effectively mounted on the bracket 4.

In some alternative embodiments, as shown in fig. 5 and 7, the bracket 4 has an i-shape, and the bracket 4 includes two first connection plates 41 and a second connection plate 42, each of the first connection plates 41 extends in a first direction, the second connection plate 42 extends in a third direction, the second connection plates 42 are respectively connected to the two first connection plates 41, and the second connection plates 42 are located at a middle portion of the first connection plates 41. Wherein, two first connecting plates 41 are arranged in parallel in the third direction, and two ends of the second connecting plate 42 are respectively connected to the middle parts of the corresponding first connecting plates 41, so that the bracket 4 is in an I shape. A plurality of mounting grooves 412 are formed in the two first connecting plates 41 at intervals, the plurality of mounting grooves 412 are distributed at intervals along the length direction of the first connecting plates 41, and the fastening members 5 are mounted on each mounting groove 412, so that the support 4 is mounted on the fixing member 200, such as a wall, and meanwhile, the weight of the support 4 can be reduced by arranging the mounting grooves 412, so that the reliability between the energy storage device 100 and the fixing member 200 can be improved.

Further, as shown in fig. 5, at least one recess 411 is formed on each first connection plate 41, and the fastener 5 is connected to the second connection plate 42 through the bottom wall of the recess 411. For example, the first connection plate 41 connected to the first connection member 31 may be formed with one groove 411, the fastener 5 is positioned in the groove 411 and connected to one end of the second connection plate 42, the first connection plate 41 connected to the second connection member 32 may be formed with three grooves 411, the three grooves 411 are spaced apart in the length direction of the first connection plate 41, the fastener 5 is connected to the second connection member 7 through two grooves 411 positioned at both ends, and the fastener 5 is connected to the other end of the second connection plate 42 through the groove 411 positioned at the middle. So set up, recess 411 provides installation space for fastener 5, avoids the tip of fastener 5 to contradict with the surface of mounting 200, improves the area of contact on support 4 and mounting 200 surface to increase the frictional force between support 4 and the mounting 200 surface, improve the installation stability of energy storage device 100.

Alternatively, as shown in fig. 5 to 7, in the third direction, a plurality of bases 8 are mounted on the side of the battery module 1 located at the lowest position, which is close to the ground, of the plurality of battery modules, one end of the base 8 is connected to the side of the battery module 1 located at the lowest position, which is close to the fixing member 200, and the other end of the base 8 is fixed on the ground, thereby fixing the position of the battery module 1 on the ground. In some alternative embodiments, the energy storage device 100 further includes an energy storage converter installed at one side of the plurality of battery modules 1 adjacent to the rack at the uppermost battery module 1, the lower end of the uppermost battery module 1 is installed on the rack 4 through the second adapter 32, and the upper end of the energy storage converter is connected to the rack 4 through the first adapter 31, and then the rack 4 is installed on the fixture 200, thereby installing the energy storage device 100 on the fixture 200.

Other constructions and operations of the energy storage device 100 according to embodiments of the present utility model are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present utility model, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "bottom", "inner", "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An energy storage device, comprising:

a plurality of battery modules, each of the battery modules having a first direction, a second direction, and a third direction, the first direction, the second direction, and the third direction being orthogonal to each other, the plurality of battery modules being stacked along the third direction;

the two ends of each connecting piece are respectively connected with two adjacent battery modules;

a plurality of adapters, each of which is connected to one side of the battery module in the second direction;

and the bracket is positioned at one side of the battery module in the second direction, is connected with the plurality of the switching pieces at one side of the battery module in the second direction, and is suitable for being connected with the fixing piece at the other side of the battery module in the second direction.

2. The energy storage device of claim 1, wherein the plurality of adapters includes a plurality of first adapters and a plurality of second adapters, the first adapters and the second adapters being positioned at both ends of the battery module in the third direction, respectively, the first adapters being open at a side of the first adapters remote from the center of the bracket in the first direction, and the second adapters being open at a side of the second adapters remote from the battery module in the second direction.

3. The energy storage device of claim 2, wherein the first adapter includes a first connection segment, a second connection segment, and a third connection segment connected to each other, the first connection segment being perpendicular to the second connection segment, a fastener passing through the first connection segment to connect to the battery module, the third connection segment being connected between the first connection segment and the second connection segment, the third connection segment being connected to the bracket.

4. The energy storage device of claim 3, wherein the first adapter further comprises:

and the fourth connecting section is connected between the first connecting section and the second connecting section, and the third connecting section and the fourth connecting section are respectively positioned at two sides of the first connecting section in the third direction.

5. The energy storage device of claim 2, wherein the second adapter includes a fifth connection segment and a sixth connection segment connected to each other, the fifth connection segment being perpendicular to the sixth connection segment, a fastener passing through the fifth connection segment to connect to the battery module, the sixth connection segment being connected to the bracket.

6. The energy storage device of claim 5, wherein said second adapter further comprises two seventh connecting segments, two of said seventh connecting segments being located at opposite ends of said fifth connecting segment in said first direction, respectively, and each of said seventh connecting segments being connected to said fifth connecting segment and said sixth connecting segment, respectively, wherein a cross-sectional area of each of said seventh connecting segments in said third direction decreases gradually in a direction away from a center of said bracket.

7. The energy storage device of any of claims 2-6, further comprising:

the two ends of each first connecting piece are respectively connected with the first adapter piece and the bracket;

and two ends of each second connecting piece are respectively connected with the second adapter piece and the bracket.

8. The energy storage device of claim 7, wherein the first connector includes a first connector portion and a second connector portion connected to each other, the first connector portion being perpendicular to the second connector portion, the first connector portion being connected to the first adapter member, the second connector portion being connected to the bracket.

9. The energy storage device of any of claims 1-6, wherein the bracket is i-shaped, the bracket includes two first connection plates each extending in the first direction and a second connection plate extending in the third direction, the second connection plates are connected to the two first connection plates, respectively, and the second connection plates are located in the middle of the first connection plates.

10. The energy storage device of claim 9, wherein each first connecting plate has at least one recess formed therein, and a fastener is attached to the second connecting plate through a bottom wall of the recess.